參數(shù)資料
型號(hào)： X5325S8I-2.7A
元件分類： 電源管理
英文描述： 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO8
封裝： PLASTIC, SOIC-8
文件頁數(shù)： 1/21頁
文件大?。?/td> 200K
代理商： X5325S8I-2.7A
REV 1.1.2 11/13/01
Characteristics subject to change without notice.
1 of 21
www.xicor.com
Replaces X25323/X25325
X5323/X5325
CPU Supervisor with 32Kb SPI EEPROM
FEATURES
Selectable watchdog timer
Low VCC detection and reset assertion
—Five standard reset threshold voltages
—Re-program low VCC reset threshold voltage
using special programming sequence
—Reset signal valid to VCC = 1V
Determine watchdog or low voltage reset with a
volatile ag bit
Long battery life with low power consumption
—<50A max standby current, watchdog on
—<1A max standby current, watchdog off
—<400A max active current during read
32Kbits of EEPROM
Built-in inadvertent write protection
—Power-up/power-down protection circuitry
—Protect 0, 1/4, 1/2 or all of EEPROM array with
Block Lock protection
—In circuit programmable ROM mode
2MHz SPI interface modes (0,0 & 1,1)
Minimize EEPROM programming time
—32-byte page write mode
—Self-timed write cycle
—5ms write cycle time (typical)
2.7V to 5.5V and 4.5V to 5.5V power supply
operation
Available packages
—14-lead TSSOP, 8-lead SOIC
DESCRIPTION
These devices combine four popular functions, Power-on
Reset Control, Watchdog Timer, Supply Voltage
Supervision, and Block Lock Protect Serial EEPROM
Memory in one package. This combination lowers
system cost, reduces board space requirements, and
increases reliability.
Applying power to the device activates the power on
reset circuit which holds RESET/RESET active for a
period of time. This allows the power supply and oscilla-
tor to stabilize before the processor can execute code.
The Watchdog Timer provides an independent protec-
tion mechanism for microcontrollers. When the micro-
controller fails to restart a timer within a selectable
time out interval, the device activates the RESET/
RESET signal. The user selects the interval from three
preset values. Once selected, the interval does not
change, even after cycling the power.
The device’s low VCC detection circuitry protects the
user’s system from low voltage conditions, resetting the
system when VCC falls below the minimum VCC trip
point. RESET/RESET is asserted until VCC returns to
proper operating level and stabilizes. Five industry stan-
dard VTRIP thresholds are available, however, Xicor’s
unique circuits allow the threshold to be reprogrammed
to meet custom requirements or to ne-tune the thresh-
old for applications requiring higher precision.
BLOCK DIAGRAM
Watchdog
Timer Reset
Data
Register
Command
Decode &
Control
Logic
SI
SO
SCK
CS/WDI
VCC
Reset &
Watchdog
Timebase
Power On and
Generation
VTRIP
+
-
RESET/RESET
Reset
Low Voltage
Status
Register
Protect Logic
8Kbits
16Kbits
EEPROM
Array
Watchdog Transition
Detector
WP
X5323 = RESET
X5325 = RESET
VCC Threshold
Reset Logic
相關(guān)PDF資料
PDF描述
X5323V14 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO14
X5323V14I-2.7T1 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO14
X5328V14I 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO14
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